Proverbs 26:28

A tongue of falsehood will hate its crushing, and a smooth mouth will make an overthrow.

Proverbs 29:5

A man making smooth against his neighbor spreads a net for his steps.

Proverbs 6:24

To watch thee from the woman of evil, from the smoothness of the strange tongue.

Proverbs 7:5

To watch thyself from the strange woman, from the stranger making smooth her sayings.

Proverbs 7:21-23

With much of her talking she caused him to turn aside; with the smoothness of her lips she will thrust him away.

Luke 20:20-21

And having observed narrowly, they sent liers-in-wait, feigning themselves to be just, that they might seize upon his word, to deliver him to the beginning and authority of the leader.

John 8:40

And now ye seek to kill me, a man who has spoken to you the truth, which I heard from God: this did not Abraham.

John 8:44-49

Ye are of your father the devil, and the eager desires of your father will ye do. He was slaying men from the beginning, and stood not in the truth, for there is no truth in him. When he would speak a lie, he speaks of his own things; for he is a liar, and the father of him.

John 10:32-33

Jesus Answered them, Many good works I shewed you from my Father; for which of these works do ye stone me

John 15:22-24

If I had not come and spoken to them, they had not sin and now they have no pretext for their sin.

Treasury of Scripture Knowledge

Summary

A lying tongue hateth those that are afflicted by it; and a flattering mouth worketh ruin.

Bible References

A flattering

Proverbs 6:24
To watch thee from the woman of evil, from the smoothness of the strange tongue.
Proverbs 7:5
To watch thyself from the strange woman, from the stranger making smooth her sayings.
Proverbs 29:5
A man making smooth against his neighbor spreads a net for his steps.
Luke 20:20
And having observed narrowly, they sent liers-in-wait, feigning themselves to be just, that they might seize upon his word, to deliver him to the beginning and authority of the leader.

General references

Judges 16:6
And Delilah will say to Samson, Announce now to me in what is thy great strength, and in what thou shalt be bound to humble thee.
1 Samuel 24:9
And David will say to Saul, Why wilt thou hear the words of man, saying, Behold, David is seeking thy hurt?
Ezekiel 12:24
For no more shall there be any vain vision and smooth divination in the midst of the house of Israel.